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Full text of "Alaskan glacier studies of the National Geographic Society in the Yakutat Bay, Prince William Sound and lower Copper River regions"

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The glaciers described in this chapter include:—(1) the Scott, Sheridan, and Sherman Glaciers, between the town of Cordova and the Copper River; (2) the Goodwin, Fickett, Saddlebag, and McPherson Glaciers, a group of ice tongues on each side of Copper River between its delta and the Childs and Miles Glaciers; and (3) Johnson and Martin River Glaciers, east of the Copper River delta at the base of the Chugach Mountains. Some of these glaciers drain into the Copper River but the streams from three of the largest ice tongues pursue independent courses to the sea, forming outwash gravel plains and deltas, which coalesce with the great delta of the Copper River.
Scott Glacier—General Description. There are several small glaciers in cirques along the mountain front, but Scott Glacier is the first large ice tongue seen from the Copper River and Northwestern Railway between Cordova and the Copper River. It occupies a valley immediately east of the mountain ridge in which Eyak Lake lies and has a known length of nearly six miles and a width of about a mile near the terminus where there is a lake half a mile long.
The surface of Scott Glacier does not seem from a distance to be much crevassed and there are several medial moraines. We lack further information about it, however, not having seen it from nearer than the railway, a distance of 7 miles. No one interested in glaciers seems to have visited or described it and the only general representations of it upon maps were made by Allen* in 1885, Abercrombie * in 1898, and Grant and Hig-gins • in 1908.
Outwash Plain. Between the glacier and the railway is an extensive outwash gravel plain, parts of which are still being built up by Eyak River and by the heavily-laden stream from Scott Glacier, which is reinforced by a stream from one of the eastern lobes of Shephard Glacier. Where these streams are actively building, the plain is barren, but the portions of it over which streams have not recently worked are heavily forested, and some parts between the railway and the ocean are extensive grassy marshes.
Sheridan Glacier—Previous Descriptions.   Sheridan Glacier is a conspicuous ice tongue,
i Allen, Henry T.. Report of a Military Reconnoiaaance in Alaska, Narratives of Explorations in Alaska, Senate Rept. 1023, 56th Congress, 1st Session, Washington, 1900, map facing p. 434.
1 Abercrombie, W. R., War Dept., Adj.-Gen. Office, No. XXV, 1899, map in pocket. Abercrombie doubtless made maps in 1884 of this and some of the other glaciers described in this chapter, but they were not published in his report and are not now on file at the Wax Department.
• Grant, U. S. and Higgins, D. F., Bull. 879, U. S. Geol. Survey, 1909, PI. IV, facing p. 88; Hid., Bull. 443, 1910, Pis. I and II.                 -